How to call postback of a frame

Hi,

I have a page with a frame.

I want to be able to call a postback of the page within the frame by clicking on a button on the outer page.

How can I do this, is it possible through the .NET side, or is there a javascript way?

Basically my page is a wizard with a next, previous and finish button, and when a user clicks the next button I want to be able to call a function in the frame page in order to save its fields to session state, so that if the user clicks previous and comes back to that page then I can retreive the info.

I've got the function to save a retreive the info to session state sorted out. I just need a way of calling it from the outer frame before it moves on to the next page in the wizard.

I had a similar situation where I needed to call a postback from another frame. The way I did it was to add another button on the frame you wanted to call. Then from the calling frame you can call __doPostBack which will be added automatically. So from the calling frame do something like:

parent.frames.NameOfThePostbackFrame.__doPostBack('btnYourButton', '')

I took the hidden button to the next level and made a special no display area control for this. I've had to do stuff like this quite a few times and finally made this http://vbforums.com/showthread.php?t=329597